Abrasive wheel



May 31, 1949.

J. CHUDNER ABRASIVE WHEEL Filed Jan. 24,1948

INVENTOR. .Jseph Chudner- Patented May 31, 1949 UNITED STATES, Q FJF ICE r 2,471,934 5 i i ABRASIVE when Josiin-ofiuafie nw York; N. Y.- Application January 24, 1 948 .S er lal'No. 4,13% 4 Claims. (ensi n-94) frills invention relat s to whens having m ans whereby the working surfaces thereof maybe relon ed whenever necessary or desired.

"More particularly, the invention relates to a wheel composed of mating sections connected for moveriint "by maiiipiilatable means into a split relation and awheel forming relation, so that a strip of abra'sivbi' other suitable material may he replaced.foruse'whenthe wheel sections are in the split relation, and so that the working surface provided by said material will have a cir- :doterfof amorehpractical and reliable as well as asafer means-for releasing, moving andsecuring tine sections of'the wheel for th'e stated purposes. v With the foregoing, other objects of the invenn will appear when thefollowing specification read in connection diawing; in which Figq l "is a side view of-a wnee1 embodying the fa tures of the-present invention, 'the sections of the wheel being shown secured in their closed relation in full lines and in their split relation in dotted lines, a portion being broken away and one part being shown in section.

Fig. 2 is a sectional view taken on the line 2-2 of Fig. 1.

Fig. 3 is an enlarged fragmentary side view of the wheel showing certain parts in section.

Shown in the drawing is a wheel comprising a pair of mating sections I 0 and II. The section In comprises a substantially semi-circular portion 12, web portion I3 and a hub l4 integral with each other. The section II comprises a substantially semi-circular portion and a web portion l6 integral therewith. The sections In and II are connected by a hinge l1 whose leaves are secured to the portions l2 and I5, as at H]. The sections In and II are thus connected at the peripheral portions for pivotal opening movement away from each other into an open or split relation, as shown in dotted lines in Fig. 1, and for pivotal closing movement toward each other into a wheel forming relation, as shown in full lines in Fig. 1.

Means connects the sections In and II to limit the opening movement thereof. Said means consists of links [9 whose opposite ends are connected with the web portions 13 and I6 by pins 20. The portions l3 and I6 have holes 2| therein larger than the diameter of the pins in order with the accompanying twith respect to the portion 12.

.2 r to provide sullicientplay to permit the pivota mo e enror the sections o and H. p

' In orderto causetlie pivotal movement of the sections Ill and 'l I toumw them tightly into and also secure them in the closed wheel forming reia'n n, and to release the sections and cause tri eps-mm opening movement to a certain ex- Zte'iit for fun o ening movement to their split relationfth're areprovi'dedmeans presently to be described. An-arbor 22 is fixed at one end to a "boss 23 onth port ion l2 orche section it. Said after '22 projects from the boss 23 tangentially The Web portion "[3 isc'ut away as at 24 to accommodate the arbor and a nut i25i having an enlarged knurled .inanipuiating streams. The nut 25 is internally threaded throughout its length .andis loosely ar- ;-ranged on the arbor 22 for rotational and axial movement. The nut 25 also may be cocked sn iny with respectto the arbor 22. A helical compression. spring 21 surrounds the arbor 22 with its opposite ends bearing on the boss 23 and the nutr25. The spring 2'! constantly urges the nut 25 inwardly along the arbor 22. An abutment 28 formed from the portion l3 by reason of the cut away 24 limits the inward movement of the nut 25 and prevents the nut from becoming separated from the arbor 22. The abutment 28 has a hole 29 therein to freely accommodate a threaded pin 30 having one end fixed to the web portion l6 of the wheel section H. The pin 30 projects from the portion l6 tangentially with respect to the portion Hi. The pin 30 is so arranged that it may be disposed in axial alinement with the nut 25 as the sections I'll and H are brought toward each other for that purpose.

From the foregoing it will be understood that the nut 25 may be rotated in one direction while being urged axially inward against the abutment 28 by the spring 21 in threaded engagement with the pin 30. This will cause closing pivotal movement of the sections l0 and II as the nut 25 is way of example, the wheel may have applied thereto a replaceable strip of emery paper 3| as the working surface over a strip of felt 32 applied on the peripheral surface of the semicircular portions l2 and [5. These portions have secured thereto pointed pegs 33 for impaling the opposite end portions of the strip 3|, there being holes 34 in the portions l2 and Hi to receive the pegs 33 when the sections I and H are in a closed relation. The strip 31 may be conveniently put in place impaled by the pegs 33 when the sections l0 and H are in the open or split relation. The strip 3| is evenly and tightly secured by closing the sections I0 and II in the manner described, thereby providing a substantially continuous circular abrasive surface. The hub l4 serves for mounting the wheel on a drive shaft for the purpose of imparting rotary movement to the wheel and its abrasive material.

I claim:

1. A wheel composed of a pair of mating sections hingedly connected at their peripheral portions, a fixed arbor and an abutment on one of said sections, a threaded pin fixed on the other one of said sections, and a rotatable and axially movable nut surroundingone end of the arbor for threaded engagement with the pin and also disengagement therefrom for the purpose of causing the closing pivotal movement of the sections toward each other into and securing them in a wheel forming relation by threaded en agement of the nut with the pin while engaged with said abutment or causing the opening pivotal movement of the sections away from each other into a split relation by unthreading and disengagement of the nut from the pin while engaged with said abutment.

2. A wheel as defined in claim 1, and a helical spring surrounding said arbor between the wheel section which carries the arbor and the nut to 4 tions hingedly connected at their peripheral portions, one of said sections having an opening therein and a fixed arbor thereon projecting into said opening, a fixed threaded pin on the other one of said sections, and a nut arranged in said openin rotatable and axially movable surrounding one end of the arbor for threaded engagement with the pin and also disengagement there- .from for the purpose of causing the closing pivotal movement of the sections toward each other into and securing them in a wheel forming relation by the threaded engagement of the nut with the pin while engaged with a wall of said opening, or causing the opening pivotal movement of the sections away from each other into a split relation by unthreading and disengagement of the nut from the pin while engaged with said .wall.

4. A wheel as defined in claim 3 wherein said pin projects loosely through a portion of the wheel section having the arbor, and the nut has an enlarged manipulating portion, said portion engageable with said Wall of said opening preventing the nut from becoming separated from the arbor.

JOSEPH CHUDNER.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 97,900 Gale Dec. 14, 1869 247,315 Coy Sept. 20, 1881 485,170 Busfield Nov. 1, 1892 555,719 Winn Mar. 3, 1896 613,079 Ross Oct. 25, 1898 917,068 Hodskinson Apr. 6, 1909 1,091,506 Gouldbourn Mar. 31, 1914 1,593,685 Ashton July 27, 1926 1,632,244 Pearson June 14, 1927 1,773,343 Burns Aug. 19, 1930 1,801,336 Duplessis Apr. 21, 1931 

